Some of it may be generational too.
Many of these teachers seem to be in there late 20s or 30s.
People that age came of age in the ‘80s,90s,early 2000s, by which time the sexual revolution had matured. Society and culture had changed, so that all these teachers had grown up in a time when it was considered ok to have sex with any number of partners, any gender of partners, and at a time in which there were not moral standards in the culture against anything sexually.
So it’s likely that a number of these teachers actually saw nothing wrong with what they were doing.
I recently watched on ESPN a competition between high school offensive and defensive lineman. They were all 6'4", 6'5", 6'6" and between 230 and 260 lbs. And they were 17 years old. In my generation, it was rare to see someone that age with that much size. Now they're all over the place. Except for between the ears they're grown men. These teachers aren't hunting the little shrinking pajama boy/mama's boy huddling off in the corner somewhere. They're hunting big game! And they're bagging it, too! Just the depraved society that we live in, I guess.